@althomas03
If you can file a 2020 return now, you will not be able to use your 2019 information to calculate EIC by the alternate method. However, because you can e-file a 2020 return and the IRS is prioritizing 2020 returns, it will get paid the fastest.
You could then file your 2019 return when you have the necessary information, and wait for it to be fully processed. Then, you could test to see if you would get a larger EIC payment by filing an amended 2020 return using your 2019 income information. However, because of the time factor involved, I would expect it would take you at least a year to see any additional refund if you are able to claim a larger refund by using your 2019 income for an EIC claim.
The fastest way to get some money ASAP would be to e-file a 2020 return now. But, expect to take six months to receive your 2019 refund and a year to receive any additional 2020 refund that you might be eligible for. The best way to get all the money that is due to you as efficiently as possible would be to file the 2019 return with a tax professional who can e-file it for you, wait for the refund to be paid which should take a couple of months, and then e-file a 2020 return by October 15.
