You can authorize someone else to sign a General Affidavit stating your vehicle is out of state and will be inspected within 10 days of your return to Missouri. You also have 180 days after discharge before a title penalty is charged on a motor vehicle, trailer, boat, outboard motor, all-terrain vehicle or manufactured home you buy. If you sell a vehicle while on active duty and deploy before you can buy a replacement, you get 180 days after you return from the deployment to buy one and still receive the sales tax allowance.
Submit the General Affidavit, Form 768, for the out-of-state inspection, and tell the Missouri motor vehicle office you are claiming a military title or sales tax allowance extension when you title the vehicle.
The General Affidavit, Form 768, your orders or deployment documentation, your discharge paperwork if you are claiming the post-discharge title window, and the title and sale documents for the vehicle.