The full presentation for the Biomass credit may not be operational yet.  There was a significant change in the form for where it shows that biomass credit this year, vs last year....so they may not yet have it programmed in for the 2021 change.

Right now, the IRS forms availability page isn't updated to show anything at all right at this moment...completely blank (1:37PM eastern) so they may be updating the list, but check it tomorrow to see when the Form 5695 will be fully available:

IRS forms availability table for TurboTax individual (personal) tax products (intuit.com)

Thank you very much SteamTrain.

The forms update site says 5695 will be available Feb. 3. Thanks again.

It is Feb 10, and still not biomass stove solution.

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@tankerx wrote:

It is Feb 10, and still not biomass stove solution.

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Both the TurboTax online editions and the TurboTax desktop edition have entry of a Biomass Fuel property on the Form 5695.

When in the Home Energy Credit section of the program you do Not enter the Biomass Fuel property on the screen labeled Tell Us How Much You Paid for Energy-Saving Improvements and do Not enter the cost in the box labeled Energy-Efficient Building Property.  Continue past the screen and answer the questions on the following screens until you land on the screen Enter Any Additional Energy-Efficient Improvements.  Enter your cost of the Biomass Fuel property in the box labeled Biomass fuel property.  This will make the property eligible for the 26% energy credit on your tax return.

Disregard, update just hit.