Answer:
17.68%
Step-by-step explanation:
Given:
Pretax book income = $1,032,000 
Net reserve for warranties = $101,600 
Additional Tax depreciation = $208,000 
Deduction of dividends received = $56,400
Now, 
Taxable income 
= Pretax book income + Net reserve for warranties - Additional Tax depreciation - Deduction of dividends received
= $1,032,000 + $101,600 - $208,000 - $56,400
= $1,133,600 - $264,400 
= $869,200
Now,
The amount of Tax at the rate 21% 
= Taxable income × Tax rate
= $869,200 × 21%
= $182,532
Therefore,
The Effective accounting tax rate 
= 
 
= 
 
= 0.1768 
or
= 0.1768 × 100%
= 17.68%