Once you fill out your personal information, it will ask you
your martial status, just select Married and follow the instructions to
set up your return to be married filing jointly. you can use the primary
taxpayer's previous TurboTax account to file a joint return.
If
you wish to place your husband's name as the primary taxpayer, for
example, start with his TurboTax account from last year. From the
Personal Info tab, change the filing status to Married Filing Jointly and add your info as spouse.
The advantage with this approach is that his info will carry over from the prior year return.