Bad debt deduction available without book write off when previously taxed income becomes irrecoverable under the statutory proviso.

If contract revenue was offered to tax under ICDS but not recorded in the books and later becomes irrecoverable, it cannot be written off in the absence of a book entry; instead, deduction may be claimed under the statutory proviso allowing bad debt deduction without book write off where the amount was taken into account in computing income in the previous year in which it became irrecoverable or an earlier year.

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