Can I file half of my taxes now and the other half later?

[xmasbaby0]

If you do that you will spend months waiting for an amended return to be processed.   The IRS is not accepting 2020 returns until February 12.   You need to wait for all of your income documents for 2020 and put all of them on the same tax return that you file ONCE --- correctly.

[MinhT1]

No, you have to report all your income on one yearly tax return.