I show that I have a solar credit carry forward of $291 but it doesnt add it to my refund. How do I get it? Thanks

You can get it, but it won't add to your refund.  A carryover of any amount of this credit will never be included in your refund amount, since it's a non-refundable credit.

A non-refundable credit is one that will only offset tax that you might otherwise owe.  Any amount of the credit that isn't used in offsetting that tax won't be reimbursed to you as part of your refund. 

See the TurboTax article What Is the Difference Between a Refundable and a Nonrefundable Credit? for more information. 

However, by federal law, if you can't use all of this credit in one year because you've offset your tax liability for that year, the unused portion will be carried forward to the next tax year.

i.e. make sure you've entered every scrap of your income first.

If your Std or Itemized deductions reduced your taxable income to a zero, without the solar credit, then you aren't suing it.

Also, there are some credits that are used before the solar one...because the solar can carry-over, certain "refundable" or a few "non-refundable" ones that don't allow a carryover, those are applied first.