You can't. When a claim is approved the date of entitlement goes back to the date the last application was filed - not the date the first application was filed. If people fail to file appeals then the earlier applications are dead. When a person becomes entitled is always based upon the last application filed - not earlier applications. Applications "die" when they are denied and the 60 day appeal period is up and a person hasn't filed an appeal. As long as a person files timely appeals then that application remains "alive."
If you are insured for social security disability (meaning that you have the work credits needed) and you stop working eventually your coverage under the disability program runs out. When a person is under age 22 they need to have worked 1 1/2 years out of the 3 years before becoming disabled. So say you've earned 12 credits before becoming disabled and you work no longer. You will remain covered for around two years after work ended. If you are denied your denial letter will also give you the date you are last insured.
Regarding date last insured - Let's say, for example, that your letter tells you you are insured through December 31, 2020. What that means is that you would be entitled to a social security disability benefit IF you meet the medical requirements BEFORE Jan 1, 2021 because as of Jan 1, 2021 you are no longer insured. So if you think of working and paying social security think of it as paying your premiums and once you stop working you will continue to be insured/covered for a few years. Older people (age 31 and older) need to have worked 5 out of the 10 years before becoming disabled. If they worked steadily and without interruption they are normally insured for social security disability benefits for at least 5 years after work ended.
Work requirement credits don't stop just because you've filed for benefits. How many work credits a person needs is determined by the date of disability. WHEN you file has nothing to do with that neither does the number of TIMES you file. You are either covered at the point of disability or you aren't. And if you are, date last insured will remain the same if you don't return to work because you stopped paying into the SS program.
When a person stops working at some point their coverage under the SS disability program runs out. So using the example above if your date last insured is December 31, 2020 then social security will consider medical records through December 31, 2020. They do not base your entitlement to social security disability on any treatments after that date. Because of that factor, SS will only process a disability claim after date last insured until you are denied and fail to file an appeal. If you file a brand new claim after date last insured it will be an automatic denial because there is no new evidence to obtain after date last insured.
Of course if you return to work and start paying into the SS program again then date last insured will be extended as you continue to earn SS credits.
When people cannot become entitled to social security disability they can then file for SSI (supplemental security income) which is a federal welfare program for the severely disabled or for people who are over age 64 called SSI Aged.
ABOUT YOUR SSI BENEFIT AMOUNT - The intent of the SSI benefit is to help people meet the bare necessities - it is a federal welfare program. Most people live in subsidized housing or they rent a room or they have roommates. They don't have luxuries unless they got them before becoming entitled. They visit food banks. Some might eat at food kitchens. They usually have food stamps and, in all states but ten, people who are entitled to SSI are automatically entitled to Medicaid. They use public transportation. Where I live there is a bus system (here it's called Go Bus) which charges a monthly fee and they will take you anywhere in the city and pick you up as long as you call them 24 hours in advance. So you need to find out what services are available in your community. NOTE: The maximum monthly SSI benefit is $750 so if you get more than that amount that means that the state you live in has supplemented the SSI benefit. Not all states supplement SSI which means that there are a lot of people living on $750 a month.
I was a SS claims rep for 32 yrs.