An extension of time to file the franchise and income tax return may be granted for six (6) months if the extension application is received timely. As a result, it is essential to determine the optimal extension time and temperature for the PCR reaction to ensure the amplification of the target sequence.Vaccines are the best way to protect from serious illness and hospitalization. You can get vaccinated for flu and COVID-19 at the same time. When optimizing PCR conditions, which conditions are particularly important? The extension time of PCR depends upon the synthesis rate of DNA polymerase and the length of target DNA. GENERAL INSTRUCTIONS North Carolina law provides for an extension of time to file a North Carolina corporate tax return (Form CD-405,. CD-401S, or CD-418). The extension time is ridiculously good with as much as 5 sec for 0.5 kb.