You will have to amend your tax return to add 1099-G you have not
reported yet.
If your return has been submitted- please wait - if it's
rejected for some reason, you can add your 1099-G and re-send the return.
If your return has been submitted and accepted- you will have to
amend; the return is mailed; takes about 16 weeks to process. Here are amending
instructions:
https://ttlc.intuit.com/replies/3288565