How to amend China treaty $5000 on Turbotax

Hello,

 

I am eligible for the US-China treaty $5000 exemption. I already filed tax return on Turbotax, but I forgot to add the treaty. I found this answer regarding to amendment:https://ttlc.intuit.com/community/tax-credits-deductions/discussion/form-1042s-on-income-tax-treaty-...

 

When I tried to amend on TurboTax, I edited the W-2 form, under "Less Common Income" I did not find "Miscellaneous Income". I tried to add a row under Box 14, but could not enter the negative number (-$5000). Please advise how can I amend the 2019 tax return for the treaty exemption! 

 

Thank you!!

Kate