Tds query

Dear Sir,

I have a query about TDS. what would be the interest rate of late deduction of TDS and late submission of TDS challan

if the company has not deducted TDS on salary for the month of Oct, Nov, Dec what interest rate would be charged

what if  the company show the payable salary and deducted all the TDS amount in 4th quarter and file the return for the same , is there any interest of penalty would be charged  please suggest me