ITC on Insurance

Credit of vehicles will be allowed only when if it is not a passenger transport vehicle having capacity of 13 or less and used for business purpose subject to condition of section 16 that you have not claimed depreciation on tax component under Income tax act.

And in case of workers insurance as per section 17(5) credit will be allowed only when taking of insurance for worker is mandatory for such type of business under any law.

For further clarification you read my article from below cited link:-

https://www.caclubindia.com/articles/a-complete-understanding-of-input-tax-credit-under-gst-39181.asp