Yes. With TurboTax you can jump around inside your return as you like and sign in and out as many times as you need to until you're ready to file. Here's how to jump around in your return(s): https://turbotax.community.intuit.ca/replies/3484165
It's typically easiest to prepare the returns together at the same time so that TurboTax can optimize your benefits and credits for you: https://turbotax.community.intuit.ca/replies/2648033