Yes. For a given assessment year, you can utilize the challans paid for that assessment year and also the challans paid for immediate earlier & next assessment year.
For example, if the TDS Return is being filed for AY 2019-20, and you have some challans which are unconsumed in AY 2017-18, 2018-19, and you want to use those challans for the return to be filed in AY 2019-20, then unconsumed challans available in AY 2018-19 can only be utilized.
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