P11D - submission by payroll agent

We have a payroll vendor who will be preparing our P11Ds for us and they will submit online, as our agent, to HMRC. They have advised that after they submit the P11Ds, we will then be able to login to Government Gateway (we have less than 500) and see the P11Ds that have been submitted, and that we can then submit the P11D(b). Is it correct that the P11D and P11D(b) can be submitted separately? Thank you.

Hi,

We recommend it is all done at once due to changes brought in by the moving of the P11D process online.
If you have issues please contact our online services helpdesk on 0300 200 3600.

Thank you.