Does choosing old tax regime for TDS on salary lead to smoother ITR processing, income tax refund claims?

Income tax regime, ITR processing: The income tax laws allow switching of tax regime from old to new or vice-versa at the time of filing income tax return. Any tax regime can be chosen irrespective of what was chosen for tax to be deducted from salary by employer. However, does switching of tax regime impact how your income tax return is processed by tax department.
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