May a person "white out" or erase on a hand written state return?

I used my free state return and did not want to pay $44 for Mo State Return (second state).  I completed the forms I received in the mail in ink, then realized I made a mistake. I whited out and wrote over mistake.  I am cautious about filling in a form online.

Just wondering if it is acceptable to whiteout or erase on a State Income Tax Form.

Thanks