How will changing filing status effect my refund?

Yes, it is worth to amend.  

Your filing status is very important because it determines the amount of your standard deduction and the tax rates and brackets your income is subject to. To read more information, click here: Change in your filing status

If you have already filed, you might not be able to go back to change unless your return is rejected.  You can return to the program to edit without amending only if your return is being rejected. If your return is accepted, to change your filing status information, you will have to amend it. You cannot just go back to change.

If your return got rejected for any reason, you can return to the program to edit information along with other changes and re-submit it. For instructions, click here Fix a reject 2019.  You do not need to file an amendment 1040-X.

If your return has been accepted, you will have to amend by filing a Form 1040-X.  Click here for instructions Amend 2019.   Please note that the 2019 Form 1040-X is not available until 2/27/2020.  Also, be aware that you should not try to amend your return until it has been fully processed and you have received your refund or your payment has cleared.