How can I check the QJV box on schedule E for jointly owned rental property?

The QJV election is not supported by TurboTax (particularly the online versions - see screenshot). 

You should aware that you and your spouse must each materially participate as the only members of a jointly owned and operated rental real estate business in order to qualify for QJV status.

qjv.png

on the schedule E input screen check item E

let me point out that if you hold the real estate in a LLC or limited partnership you are not suppose to use the QJV option.   the IRS actually wants you to file a partnership return.     A qualified joint venture, for purposes of this provision, includes only businesses that are owned and operated by spouses as co-owners, and not in the name of a state law entity (including a limited partnership or limited liability company). the IRS can impose penalties for failure to file a partnership return  in this case.

if it is not an LLC or LP or other state law entity and thus qualify for the QJV option

Making the election. To make this election for your rental real estate business, check the "QJV" box on line 2 for each property that is part of the qualified joint venture. You must divide all items of income, gain, loss, deduction, and credit attributable to the rental real estate business between you and your spouse in accordance with your respective interests in the venture.  Each of you must report your interest as separate properties on line 1 of Schedule E. On lines 3 through 22 for each separate property interest, you must enter your share of the applicable income, deduction, or loss