What is the timeframe to contest a will and what are the grounds?

A will must be contested within two years of the date it was admitted to probate, with some exceptions. Texas Estates Code section 256.204. A will may be contested on the grounds that 1) the testator did not have the capacity to make the will, or 2) undue influence was used on the testator to induce the execution of the will in its present form. Both of these are challenging and expensive cases to litigate.