An extract from TFL's site telling us the disruption we can expect here:
To enable the Bond Street station upgrade to get underway, Oxford Street will be closed eastbound between Duke Street and Vere Street for utility works from 14 February for nine months and several bus routes will be on diversion. From April, for eight months, the Northern line won’t stop at Tottenham Court Road station so that major structural works can take place in the platform tunnels. The Central line will continue to serve the station as normal.
You may like to revisit a post I did on this station last April