Yes, it is recommended to file together. You will be charged for 2 returns regardless as you will need to file them separately- even if completing a joint return.
To help, TurboTax offers coupled returns starting from TurboTax Standard products which are prepared simultaneously. All TurboTax programs prompt you to enter information about you and your spouse, and while entering the information, the tax software crunches the numbers and decides who benefits from which credits, optimizing your returns to minimize your overall taxes owed, and maximize refunds and tax credits where possible.
Thank you for choosing TurboTax. If you have further questions, please feel free to contact us.