I'm having the same issue. Using Standard the support is limited and seemingly claiming the Temporary Flat Rate Method is not possible with Turbo tax. If so, I can't find a solution and would like to see Turbo Tax publish the work around to this...
I am disappointed with Turbotax. After an hour on their help line I was told the format was the the Gov'ts requirement. As far as I know there is no intention to fix and the call was marked as complete with no follow-on. I tried some creative solutions and the software flaged as not possible. At the end of the day, I've submitted and it's cost me money as I was unable to claim - The full method is known to come up with lower values. So much for the Turbotax guarantee. I couldn't take advantage of a vaild tax deduction. They should be ashamed.
Agreed on the manual calcs. I've worked in the contract world and the % of my home used for my office is low and don't see it worth the effort to complete the detailed form. Looks like I (and everybody else who subscribes to this service) will be leaving a $400 deduction off the table due to Turbo Tax limitations. Too much time invested to start over with a new service provider this year, but will be doing so next year.
Does anybody with Turbo Tax monitor this Community??? Seems to me the fix isn't that difficult, create a page/form in the Deductions section, select enter number of days x $2 (or) select max of $400. Glad I didn't subscribe to the supported level, would have cost me almost as much as I could have saved with the deduction, which apparently I would have been told I couldn't submit it with this software.