In the state of Pa. is RMD from retirement accounts after you attaine age 70 1/2 taxable?

No.  Pennsylvania should not be taxing your Required Minimum Distributions.

Pennsylvania does not tax Social Security benefits or any eligible Pennsylvania public or private pension plan. Neither does it tax distributions from 401(k)s, IRAs, deferred-compensation plans or other retirement accounts.

During the PA interview, TurboTax will ask what type of retirement plan distribution each `1099R represents.  The answer to this question determines if that distribution is taxable as some 1099R's are partially or fully taxable.   Generally, if box 7 of the 1099R is coded 4 or 7, it is not taxable to PA.  If box 7 includes a "D"  (commercial annuity), then it is taxable same as federal.