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Section 234B provides for levy of interest for default in payment of advance tax.

Interest under section 234B is levied in following two cases:

a) When the taxpayer has failed to pay advance tax though he is liable to pay advance tax; or

b) Where the advance tax paid by the taxpayer is less than 90% of the assessed tax 

Section 234C provides for levy of interest for default in payment of instalment(s) of advance tax. 

Refer: interest-payable-by-taxpayer.