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Since 2014 comma the symbiotic recurrent nova T Coronae Borealis has been in a high accretion rate state comma rapidly accumulating the hydrogen-rich fuel that the massive white dwarf in this system will need for its next nova eruption comma expected within several years. T CrB is evolving within this high state comma with the optical light showing a gradual fading. XMM observations in 2017 comma 2018 comma and 2020 comma however comma suggested that the accretion rate remained relatively constant. The observed differences appear to be caused by changes in the intrinsic absorber comma probably related to the accretion disk wind. We therefore propose a set of two joint XMM -HST observations to monitor the accretion rate through the Keplerian disk and the boundary layer comma and the amount of X-ray-UV absorber during this crucial period.