I've filed my return today but i forgot to add my SSA 1099 and my state tax return is already accepted. is there any way to add this information after filing?
Your state tax return could not have been accepted if the IRS did not accept your federal return, you will have to amend your federal tax return to include the SS benefits reported to you on a SSA-1099.
Do not amend the federal return until the IRS has finished processing the return and either has sent you a letter requesting the SSA-1099 or the IRS has issued the tax refund or processed the taxes owed and paid with return.
See this TurboTax support FAQ for amending a tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-already-filed/L4VjJ9BA2_US_en_US
Your pending returns can not be changed. If your return is accepted you will get an email. If the return is rejected the e-mail will tell you what to correct and you can make changes before e-filing again. Amend to change an accepted return after you get your refund. Instructions below. https://ttlc.intuit.com/community/amending/help/how-to-amend-change-or-correct-a-return-you-already-filed/00/25588