This T value is search in the critical values table from Wilcoxon signed rank test. We can read the table in the row corresponding to differences non-zero. Each row has ranges different of values corresponding to different p-values.   

If the T-values is out of range of the column or exactly equal at one of range- values, the p-value is less that corresponding to the column. 

If the T-value is between the values of range, p-value is higher that corresponding to the column.