Amended return

The first thing you do is remove the additional K-1s that you entered and put your tax return back the way it was when you filed it on March 31. Then you follow the procedure for amending your 2018 tax return. Go to the following link for instructions to amend a 2018 tax return that you filed with TurboTax.

How do I amend a 2018 return in TurboTax?

An amended return has to be filed on a special form, Form 1040X. It cannot be e-filed. You have to print it, sign it, and file it by mail. It takes the IRS up to 16 weeks to process an amended return.

Mail in the amended return as the filing instruction page says to do ... if you did not start the amendment process when you added this new form you will have to undo the entry and start the amendment process correctly. 

https://ttlc.intuit.com/community/amending/help/how-to-amend-change-or-correct-a-return-you-already-filed/00/25588

Look at the form 1040X …

Column A should have the figures from the original return, Column C the corrected figures and Column B the differences between the other 2 which needs an explanation on page 2 of the form 1040X.

If you completed it correctly you will see an entry on either line 16 OR 18:

On line 16 should be the amount you paid with your original return. 

On line 18 should be the amount of your original refund you received.

Then you will see your extra refund on line 22 OR  the new balance due you need to pay on line 20.