1099 tax year 2019
No. You cannot add or change anything to a tax return after you e-file it. You have to wait until it has been FULLY PROCESSED by the IRS and then you can amend the return to add or change information.
How do I amend my 2019 TurboTax Online return?
https://www.irs.gov/filing/individuals/amended-returns-form-1040-x/amended-return-frequently-asked-questions
https://ttlc.intuit.com/questions/1908543-do-i-need-to-amend