Do your tax return now, without the missing 1099-G (see option #2, above).
If the IRS got the form and it changed your taxes, they will send you an automated notice (not an audit). They will calculate any tax due (plus interest and penalties) and you can send them a check. They will also send a pre-addressed envelope and payment voucher, for you convenience.
The IRS uses this simplified procedure since It is extremely common to omit reporting a Form 1099. You file before they arrive, they get lost in the mail, get lost in your house or get tossed along with junk mail.
@Annie_1
