Already sent taxes in but just got this new corrected 1099 Misc.
form from the same company, I tried going through the amend option in TT but it was treating it as a new 1099 Misc. form. How do I handle this?
Yes, you should amend your return to include the additional income. See link below that explains how to amend your return using TurboTax:
https://ttlc.intuit.com/replies/5114064
What changed on the 1099?
The amount earned went up about $600.