I found that council tax support was an administrative question separate from fostering approval: I had to explain my household circumstances to the council and ask which evidence it required before it could assess my account.
Keeping fostering paperwork together helped. I recorded the council’s reference, supplied the requested evidence and checked that any decision covered the correct address and period. I also asked what to do if my circumstances changed.
Keep the council’s written decision. If the result is unclear, ask for the reason and the review or appeal route. A fostering social worker can help explain the wording, but the council makes the council tax decision.