" Can a Section 469(c)(7)(a) election be done in turbo tax"
Yes, it can. However, the election is not officially supported and will require the use of Forms Mode. Further, making the election will, most likely, require printing and mailing the return.
See https://images.turbotax.intuit.com/iqcms/support/new_lib/images/TY16/2016-Unsupported-Calcs-GEN12868...
